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ARE INVASIVE SPECIES THE DRIVERS OR PASSENGERS OF CHANGE IN DEGRADED ECOSYSTEMS
Examination of the impact of two invasive dominant perennial grasses on community structure in an invaded, fragmented, and fire-suppressed oak savanna suggests that relative abundance is determined more by trade-offs relating to environmental conditions than to traits relating to resource capture. Expand
Impact of Food and Predation on the Snowshoe Hare Cycle
Food and predation together had a more than additive effect, which suggests that a three-trophic-level interaction generates hare cycles. Expand
Density dependence in an annual plant community: variation among life history stages
Variation in mechanism, direction, and magnitude of interactions among life history stages suggests that current models of plant community structure that are based largely on exploitation competition as it influences growth are inadequate for even this simple annual plant community. Expand
The effects of NPK fertilization for nine years on boreal forest vegetation in northwestern Canada
An analysis of the growth responses of components of a boreal plant community, the dominant shrubs Salix glauca and Betula glandulosa and the dominant tree Piceaglauca, to the addition of an NPK fertilizer over a nine-year period finds all predictions were found to be true. Expand
Diversity loss with persistent human disturbance increases vulnerability to ecosystem collapse
This research shows how biodiversity can be crucial for ecosystem stability despite appearing functionally insignificant beforehand, a relationship probably applicable to many ecosystems given the globally prevalent combination of intensive long-term land management and species loss. Expand
The effects of fertilization and herbivory on the herbaceous vegetation of the boreal forest in north-western Canada: a 10-year study
The results suggest that the percentage cover and composition of herbaceous vegetation in the boreal forest are determined almost exclusively by the productivity of the site (bottom-up control) and that the activities of mammalian herbivores may be important only during peaks in hare population densities (interactive control). Expand
Ecosystem properties determined by plant functional group identity
There are greater effects of losing graminoids than one would predict based on their biomass contributions to the community, and functional group identity plays a critical role in determining the effects of diversity loss in this northern grassland. Expand
Population changes of the vertebrate community during a snowshoe hare cycle in Canada’s boreal forest
It is concluded that species in the boreal forests of Canada do not exhibit the strong synchrony found between voles and other members of the vertebrate community in northern Fennoscandia. Expand
The mutualism-parasitism continuum in ectomycorrhizas: a quantitative assessment using meta-analysis.
The results indicate that the variation in ectomycorrhizal fungi perceived by the host may be of a discrete (presence/absence) rather than continuous nature (variation in identity or abundance of ectomy corollary fungi). Expand
Tracking Soil Temperature and Moisture in a Multi-Factor Climate Experiment in Temperate Grassland: Do Climate Manipulation Methods Produce their Intended Effects?
Passive open-top chambers (OTCs) and rainout shelters (RSs) have been used for over two decades to manipulate temperature and water availability in experiments on plant communities. These types of… Expand